content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.observable.internal.operators;
  
  import java.util.concurrent.atomic.AtomicReference;
  
  import io.reactivex.common.Disposable;
  import io.reactivex.common.exceptions.*;
  import io.reactivex.common.functions.Function;
  import io.reactivex.common.internal.disposables.DisposableHelper;
  import io.reactivex.common.internal.functions.ObjectHelper;
  import io.reactivex.observable.*;
  
  /**
   * Subscribes to the MaybeSource returned by a function if the main source signals an onError.
   * 
   * @param <T> the value type
   */
  public final class MaybeOnErrorNext<T> extends AbstractMaybeWithUpstream<T, T> {
  
      final Function<? super Throwable, ? extends MaybeSource<? extends T>> resumeFunction;
  
      final boolean allowFatal;
  
      public MaybeOnErrorNext(MaybeSource<T> source,
              Function<? super Throwable, ? extends MaybeSource<? extends T>> resumeFunction,
                      boolean allowFatal) {
          super(source);
          this.resumeFunction = resumeFunction;
          this.allowFatal = allowFatal;
      }
  
      @Override
      protected void subscribeActual(MaybeObserver<? super T> observer) {
          source.subscribe(new OnErrorNextMaybeObserver<T>(observer, resumeFunction, allowFatal));
      }
  
      static final class OnErrorNextMaybeObserver<T>
      extends AtomicReference<Disposable>
      implements MaybeObserver<T>, Disposable {
  
  
          private static final long serialVersionUID = 2026620218879969836L;
  
          final MaybeObserver<? super T> actual;
  
          final Function<? super Throwable, ? extends MaybeSource<? extends T>> resumeFunction;
  
          final boolean allowFatal;
  
          OnErrorNextMaybeObserver(MaybeObserver<? super T> actual,
                  Function<? super Throwable, ? extends MaybeSource<? extends T>> resumeFunction,
                          boolean allowFatal) {
              this.actual = actual;
              this.resumeFunction = resumeFunction;
              this.allowFatal = allowFatal;
          }
  
          @Override
          public void dispose() {
              DisposableHelper.dispose(this);
          }
  
          @Override
          public boolean isDisposed() {
              return DisposableHelper.isDisposed(get());
          }
  
          @Override
          public void onSubscribe(Disposable d) {
              if (DisposableHelper.setOnce(this, d)) {
                  actual.onSubscribe(this);
              }
          }
  
          @Override
          public void onSuccess(T value) {
              actual.onSuccess(value);
          }
  
          @Override
          public void onError(Throwable e) {
              if (!allowFatal && !(e instanceof Exception)) {
                  actual.onError(e);
                  return;
              }
              MaybeSource<? extends T> m;
  
              try {
                  m = ObjectHelper.requireNonNull(resumeFunction.apply(e), "The resumeFunction returned a null MaybeSource");
              } catch (Throwable ex) {
                  Exceptions.throwIfFatal(ex);
                  actual.onError(new CompositeException(e, ex));
                  return;
              }
  
              DisposableHelper.replace(this, null);
  
              m.subscribe(new NextMaybeObserver<T>(actual, this));
          }
  
          @Override
          public void onComplete() {
              actual.onComplete();
          }
  
          static final class NextMaybeObserver<T> implements MaybeObserver<T> {
              final MaybeObserver<? super T> actual;
  
              final AtomicReference<Disposable> d;
  
              NextMaybeObserver(MaybeObserver<? super T> actual, AtomicReference<Disposable> d) {
                  this.actual = actual;
                  this.d = d;
              }
  
              @Override
              public void onSubscribe(Disposable d) {
                  DisposableHelper.setOnce(this.d, d);
              }
  
              @Override
              public void onSuccess(T value) {
                  actual.onSuccess(value);
              }
  
              @Override
              public void onError(Throwable e) {
                  actual.onError(e);
              }
  
              @Override
              public void onComplete() {
                  actual.onComplete();
              }
          }
      }
  }
  